Pet food supplement



FIG. 1 is a front elevational view of a pet food supplement showing our new design;

FIG. 2 is an isometric view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a first side elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a second side elevational view thereof; and,

FIG. 7 is a rear elevational view thereof. 

The ornamental design for a pet food supplement, as shown and described. 